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    THE BIOCHEMICAL AND PHYSIOLOGICAL CHARACTERIZATION OF POLIOVIRUS MUTANTS (TEMPERATURE-SENSITIVE, IN SITU LYSIS, GUANIDINE RESISTANT, MUTATIONS).

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    Author
    ANTINORO, NORLA MARIE WALSER.
    Issue Date
    1984
    Keywords
    Poliovirus -- Genetics.
    Viral genetics.
    
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    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    Poliovirus is a small, structurally simple virus that can serve as a powerful model system for the elucidation of the basic processes involved in the genetic control of macromolecular synthesis. The physical and biochemical characterization of temperature-sensitive and drug-resistant mutants of this virus can provide insight into the normal sequence of events during the replication and assembly of the wild-type (wt) virus. The specific interference of the infecting virus with the major pathways of macromolecular synthesis in the host cell offers a possible inroad to the exploration of the relevant control systems. This research is divided into two major segments: (1) a temperature-sensitive mutant of poliovirus type 1, tsB9, and a guanidine-resistant mutant, gʳH, were characterized physiologically; (2) a physiological screening procedure that quickly and efficiently reveals the phenotype of a large number of poliovirus mutants in a short period of time was developed and validated. Two guanidine-resistant and twelve temperature-sensitive mutants of poliovirus type 1, Mahoney, were generated and compared with wt, defective-interfering particles, gʳH, and tsB9 using the screening procedure herein developed. The temperature-sensitive mutant, tsB9, appears to be a structural protein mutant bearing a related defect in ribonucleic acid synthesis at the restrictive temperature. The mutant gʳH was found to differ from the wt virus only in the guanidine resistance of its growth and ribonucleic acid synthesis, although a detailed electrophoretic analysis of its proteins was not done. Among the newly isolated mutants, strains were found with defects in each of the major viral functions except one. No mutant was found to be defective in the ability to inhibit host-cell protein synthesis. The screening procedure developed met all of the criteria set for it mentioned above. It has the potential of being adapted to many virus-cell systems for the rapid determination of mutant phenotype.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Molecular and Cellular Biology
    Graduate College
    Degree Grantor
    University of Arizona
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